5581864 has 8 divisors (see below), whose sum is σ = 10466010. Its totient is φ = 2790928.

The previous prime is 5581853. The next prime is 5581871. The reversal of 5581864 is 4681855.

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 2377764 = 1790^2 + 1542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348859 + ... + 348874.

Almost surely, 2^5581864 is an apocalyptic number.

It is an amenable number.

5581864 is a deficient number, since it is larger than the sum of its proper divisors (4884146).

5581864 is a wasteful number, since it uses less digits than its factorization.

5581864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697739 (or 697735 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 5581864 is about 2362.5968763206. The cubic root of 5581864 is about 177.3888903257.

Subtracting from 5581864 its reverse (4681855), we obtain a palindrome (900009).

The spelling of 5581864 in words is "five million, five hundred eighty-one thousand, eight hundred sixty-four".